Porsche 997.1 GT3 JRZ PROactive Coilover KitLong time collaborator of TPC and suspension industry leader JRZ makes its remarkable first foray into the electronic shocks market with the PROactive line, combining one of the fastest valves on the market with exceptionally high performance dampers. Representing our 30+ year partnership are over 50 race wins and podium finishes, racing cars powered jointly by TPC and JRZ in the Grand Am Rolex series since the mid 90s. JRZ PROactive Motorsport line